2015A&A...576L..10T


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST02:48:35

2015A&A...576L..10T - Astronomy and Astrophysics, volume 576, L10-10 (2015/4-1)

Shallow extra mixing in solar twins inferred from Be abundances.

TUCCI MAIA M., MELENDEZ J., CASTRO M., ASPLUND M., RAMIREZ I., MONROE T.R., DO NASCIMENTO J.D.Jr and YONG D.

Abstract (from CDS):

Lithium and beryllium are destroyed at different temperatures in stellar interiors. As such, their relative abundances offer excellent probes of the nature and extent of mixing processes within and below the convection zone. We determine Be abundances for a sample of eight solar twins for which Li abundances have previously been determined. The analyzed solar twins span a very wide range of age, 0.5-8.2Gyr, which enables us to study secular evolution of Li and Be depletion. We gathered high-quality UVES/VLT spectra and obtained Be abundances by spectral synthesis of the BeII 313nm doublet. The derived beryllium abundances exhibit no significant variation with age. The more fragile Li, however, exhibits a monotonically decreasing abundance with increasing age. Therefore, relatively shallow extra mixing below the convection zone is necessary to simultaneously account for the observed Li and Be behavior in the Sun and solar twins.

Abstract Copyright:

Journal keyword(s): Sun: abundances - Sun: atmosphere - Sun: evolution - Sun: interior - stars: abundances - stars: interiors

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 824 0
2 HD 45346 PM* 06 24 43.7599998222 -43 24 20.426416714   9.32 8.63     G5V 38 0
3 HD 133600 PM* 15 05 13.2481747000 +06 17 23.691579336       7.8   G0 40 0
4 HD 142331 PM* 15 54 19.7884329411 -08 34 49.368533050   9.39 8.75     G5V 25 0
5 * 18 Sco PM* 16 15 37.2703721200 -08 22 09.981989277   6.15 5.50     G2Va 485 0
6 HD 167060 PM* 18 17 44.1430392515 -61 42 31.622613666   9.56 8.92     G3V 26 0
7 HD 197027 PM* 20 41 54.6337513102 -27 12 57.415448921   9.80 9.15     G3V 51 0
8 HD 202628 PM* 21 18 27.2693236958 -43 20 04.746121764   7.39 6.742     G5V 141 0
9 HD 202826 PM* 21 20 08.9006827233 -48 48 50.873459240   8.67 8.16     F7IV 4 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-02:48:35

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